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Quiz10 questions · 20 min

Pythagorean theorem

1. Which is the correct statement of the theorem?

a + b = ca² + b² = c²a² − b² = c²

2. The hypotenuse is the longest side.

TrueFalse

3. Legs 6 and 8. The hypotenuse is ____.

Scale 2–6 · key on p. 3

Lesson planGrade 8 · Maths

Pythagorean theorem

Subject: Maths · Grade: 8 · One lesson (45 min)

Learning objectives

Students state the Pythagorean theorem in words and as the formula a² + b² = c².
They identify the legs and the hypotenuse of a right triangle.
They apply the theorem to find an unknown side.

Lesson flow

Opening — 2 min
Motivation — 5 min
Reviewing prior knowledge — 5 min
New material: statement and proof — 20 min

Teacher: “You are building a house and want the corners of the foundation to be exactly 90°. How would you check that without a protractor?”

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